These three units of the Learning Activity Packages (LAPs) for individualized instruction in physical science cover the physical and chemical properties of water, dehydration of crystals, solutions, acidity, strong and weak bases, neutral properties of salts, amorphous forms of carbon, hydrocarbons, and petroleum products. Each unit contains a rationale for the material; a list of behavioral objectives for the unit; a list of resources including texts, reading assignments, specified problems, handouts, tape recordings, and science activities and experiments; a problem set for student self-evaluation; suggestions for advanced study; and references. Related physical science LAPs are SE 016 422 and SE 016 424. (CC)